A streamlined body falls through air from a height h on the surface of a liquid. If d and D(D > d) represents the densities of the material of the body and liquid respectively, then the time after which the body will be instantaneously at rest, is

• A.             \[\sqrt{\frac{2h}{g}}\]       
• B.             \[\sqrt{\frac{2h}{g}\,.\,\frac{D}{d}}\]
• C.             \[\sqrt{\frac{2h}{g}\,.\,\frac{d}{D}}\]                                     
• D.             \[\sqrt{\frac{2h}{g}}\,\left( \frac{d}{D-d} \right)\]